can someone help me with this managerial prectice problem

Required information A company sold a total of 1,000 units for total sales revenue of $60.000. The company incurred total variable expenses of $39,000 and total fixed expenses of $ 14,700. Based on this, the company reported a total contribution margin of $21,000 and net operating income of $ 6,300. Use this information to answer the following questions. Assume that all units are within the relevant range. Calculate the margin of safety in dollars and the margin of safety percentage. Margin of safety in dollars Margin of safety percentage